⁴³K from the ⁴¹K(t,p) reaction

The reaction ⁴¹K(t,p)⁴³K has been investigated with a 15-MeV triton beam. Twenty levels of ⁴³K (many of them unreported previously) have been identified up to about 3.4 MeV excitation energy. Angular distributions were measured for all levels. Comparison with distorted-wave Born-approximation calculations allows extraction of L values for most of them. Three multiplets arising from the couplings of (1ƒ_7/2)²_J=2 and (1ƒ_7/2)²_J=4 transferred neutrons with the 1d3/2 proton hole have been identified in K43. Their energy centroids are closely related to the (1ƒ_7/2)⁴ spectrum of ⁴⁴Ca. The general sum rules for two-nucleon transfer reactions and a more specialized sum rule give a good account of the data and suggest spin and parity assignments for many of the observed states. The positive parity states in ⁴³K are compared with ƒ⁴_7/2(d_3/2s_½)^-1 and ƒ³_7/2p_3/2d^-1_3/2 shell-model calculations.